Abstract
A new technique for measuring the dynamic response of optical phase
modulators is presented. It is based on a photonic signal processor principle,
in which the phase modulator is inserted in a Sagnac loop, and coherent summation
of the counter-propagating phase modulated signals converts the off-loop-center
phase modulation into intensity modulation, so that modulator response can
be measured on a network analyzer from the envelope of the resulting microwave
photonic filter response. Experimental results demonstrate that this technique
is applicable for both polarizing and nonpolarizing waveguide optical phase
modulators, and that it has wideband measurement capabilities with swept frequency
response characterization features.
© IEEE
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